Jun 17, 2004 #1 F fjpompeo Advanced Member level 1 Joined Nov 29, 2003 Messages 415 Helped 0 Reputation 0 Reaction score 0 Trophy points 1,296 Location Brazil Activity points 3,044 4n25 drive ttl How do I build an isolated RS232C to TTL interface using 4N25 or TIL111 optocouplers to work with speed up to 4800baud and RS232C side be powered by RS232C computer's interface? Regards, Fernando
4n25 drive ttl How do I build an isolated RS232C to TTL interface using 4N25 or TIL111 optocouplers to work with speed up to 4800baud and RS232C side be powered by RS232C computer's interface? Regards, Fernando
Jul 28, 2004 #2 J joajas Junior Member level 1 Joined Jul 17, 2004 Messages 16 Helped 0 Reputation 0 Reaction score 0 Trophy points 1,281 Activity points 176 rs232c ttl how about using 1488 and 1489 to interface between rs232c and ttl
Jul 31, 2004 #3 M mild seven Junior Member level 2 Joined Apr 14, 2002 Messages 22 Helped 0 Reputation 0 Reaction score 0 Trophy points 1,281 Activity points 122 isolated rs232c interface how about infrared? isolation, high speed for future and self-powered for PC side transceiver.
isolated rs232c interface how about infrared? isolation, high speed for future and self-powered for PC side transceiver.
Jul 31, 2004 #4 M mild seven Junior Member level 2 Joined Apr 14, 2002 Messages 22 Helped 0 Reputation 0 Reaction score 0 Trophy points 1,281 Activity points 122 rs232c to ttl 1. self powered : How to get power from RS-232 port 2. use **broken link removed** replace 7805 to get more current. 3. use compatible max232 devices to convert level and drive Optocoupler. good luck!!!
rs232c to ttl 1. self powered : How to get power from RS-232 port 2. use **broken link removed** replace 7805 to get more current. 3. use compatible max232 devices to convert level and drive Optocoupler. good luck!!!